NASA's Parker Solar Probe reached approximately 690,000 km/h (192 km/s) relative to the Sun during a close perihelion pass on December 24, 2024 — the fastest speed any human-made object has ever achieved, driven by the Sun's gravity as the probe dives to within 6.1 million km of the solar surface.
The question, scope, and sources behind this Registry record.
NASA's Parker Solar Probe reached approximately 690,000 km/h (192 km/s) relative to the Sun during a close perihelion pass on December 24, 2024 — the fastest speed any human-made object has ever achieved, driven by the Sun's gravity as the probe dives to within 6.1 million km of the solar surface.
The greatest speed relative to the Sun ever reached by a human-made object — a different metric from Apollo 10's speed record relative to Earth, since Parker Solar Probe's speed comes from its close solar orbit rather than an Earth-return trajectory.
Change a parameter to stress-test whether a proposed result is still inside the published specification. This is an audit aid, not a proof checker.
This record has no editable parameters. Read the formal question and assumptions before challenging it.
Current frontiers derived from accepted Claims.
An observed or demonstrated result; no opposing bound is implied.
The frontier is not sacred
Most progress starts with a disagreement that survives contact with evidence. If you can push the known lower bound up or pull the upper bound down, show us the work.
≥ when you have shown that at least this value is achievable.≤ when you have shown that anything above this value is impossible.No vibes. State the value, define the scope, and link the paper, proof, code, or reproduction that lets another person check it. Editors review every challenge before the public record changes.
Challenge this recordAssertions tied to evidence, attribution, and review.
The frontier as it changed over time.
Only accepted Claims matching the current specification contribute to the displayed bounds. Strict inequalities remain open; contradictory Claims require editorial review.
1 accepted Claim, with 1 linked evidence records.
Permanent ID limitsregistry.com/limits/LR-FASTEST-SPACECRAFT-PARKER
No active verified bounties are linked to this Limit.
View verified bounty tracker ↗No accepted machine-checked reproductions are recorded for this Limit.
Limits Registry. LR-FASTEST-SPACECRAFT-PARKER. Fastest human-made object (speed relative to the Sun). 2026.